Card Type	Serial controller
Chipset/Controller	16450
I/O Options	Serial ports (2)
Maximum DRAM	N/A

CONNECTIONS
Purpose	Location	Purpose	Location
Serial port 1	CN1	Serial port 2	CN2

INPUT CLOCK CONFIGURATION
MHz		J1
»	1.8432MHz	Pins 1 & 2, 3 & 6, 4 & 5 closed
	3.6864MHz	Pins 1 & 2, 5 & 6 closed
	9.216MHz	Pins 2 & 3, 4 & 5 closed
	18.432MHz	Pins 2 & 5 closed

PRIMARY PORT ADDRESS SELECT
Address		SW1/1	SW1/2	SW1/3	SW1/4	SW1/5	SW1/6	SW1/7	SW1/8
»	03F8h	On	Off	Off	Off	Off	Off	Off	Off
	02E0h	On	Off	On	Off	Off	Off	On	On
	02F8h	On	Off	On	Off	Off	Off	Off	Off
	03E8h	On	Off	Off	Off	Off	Off	On	Off

ALTERNATE PORT ADDRESS SELECT
Address		SW2/1	SW2/2	SW2/3	SW2/4	SW2/5	SW2/6	SW2/7	SW2/8
»	02F8h	On	Off	On	Off	Off	Off	Off	Off
	02E0h	On	Off	On	Off	Off	Off	On	On
	03E8h	On	Off	Off	Off	Off	Off	On	Off
	03F8h	On	Off	Off	Off	Off	Off	Off	Off

CHANNEL CONFIGURATION
Setting	J4
Channel 1 enabled	Pins 1 & 3 closed
Channel 2 enabled	Pins 2 & 4 closed

PRIMARY PORT INTERRUPT SELECT
IRQ	J5/A	J5/B	J5/C	J5/D	J5/E	J5/F
IRQ2	Closed	Open	Open	Open	Open	Open
IRQ3	Open	Closed	Open	Open	Open	Open
IRQ4	Open	Open	Closed	Open	Open	Open
IRQ5	Open	Open	Open	Closed	Open	Open
IRQ6	Open	Open	Open	Open	Closed	Open
IRQ7	Open	Open	Open	Open	Open	Closed

ALTERNATE PORT INTERRUPT SELECT
IRQ	J6/A	J6/B	J6/C	J6/D	J6/E	J6/F
IRQ2	Closed	Open	Open	Open	Open	Open
IRQ3	Open	Closed	Open	Open	Open	Open
IRQ4	Open	Open	Closed	Open	Open	Open
IRQ5	Open	Open	Open	Closed	Open	Open
IRQ6	Open	Open	Open	Open	Closed	Open
IRQ7	Open	Open	Open	Open	Open	Closed

PRIMARY PORT INTERRUPT SHARING
Setting	J2
Dedicated interrupt level	Pins 2 & 3, 5 & 6 closed
Interrupt sharing	Pins 1 & 2, 4 & 5 closed

ALTERNATE PORT INTERRUPT SHARING
Setting	J3
Dedicated interrupt level	Pins 2 & 3, 5 & 6 closed
Interrupt sharing	Pins 1 & 2, 4 & 5 closed

PRIMARY PORT AUXILIARY CHANNEL CONFIGURATION
Transmission	Reception	Loopback	J8
RTS	CTS	XCLK/RCLK	Pins 1 & 2, 3 & 6, 4 & 5 closed
XCLK	RCLK	RTS/CTS	Pins 1 & 4, 2 & 3, 5 & 6 closed
N/A	N/A	RTS/CTS/XCLK/RCLK/AUXOUT/AUXIN	Pins 1 & 4, 2 & 5, 3 & 6 closed

ALTERNATE PORT AUXILIARY CHANNEL CONFIGURATION
Transmission	Reception	Loopback	J10
RTS	CTS	XCLK/RCLK	Pins 1 & 2, 3 & 6, 4 & 5 closed
XCLK	RCLK	RTS/CTS	Pins 1 & 4, 2 & 3, 5 & 6 closed
N/A	N/A	RTS/CTS/XCLK/RCLK/AUXOUT/AUXIN	Pins 1 & 4, 2 & 5, 3 & 6 closed

PRIMARY PORT DRIVER CONFIGURATION
Driver	J7
- DTR	Pins 1 & 5 closed
+ DTR	Pins 2 & 6 closed
- RTS	Pins 3 & 7 closed
+ RTS	Pins 4 & 8 closed

ALTERNATE PORT DRIVER CONFIGURATION
Driver	J9
- DTR	Pins 1 & 5 closed
+ DTR	Pins 2 & 6 closed
- RTS	Pins 3 & 7 closed
+ RTS	Pins 4 & 8 closed